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公开(公告)号：US11829024B2
公开(公告)日：2023-11-28
申请号：US17435203
申请日：2020-02-18
IPC分类号： G02F1/1335 , G02F1/13357
CPC分类号： G02F1/133533 , G02F1/133605
摘要： An optical stack for reflecting and transmitting light in a predetermined wavelength range includes stacked first and second optical films, the predetermined wavelength range defining a first wavelength range and a remaining wavelength range. For normally incident light and for each wavelength in a first wavelength range, the first optical film substantially reflects light having a first polarization state, and substantially transmits light having a second polarization state. For each of the first and second polarization states, for wavelengths in the first wavelength range, the second optical film has a maximum optical transmittance Tmax for light incident at a first incident angle, and an optical transmittance Tmax/2 for light incident at a second incident angle, where the second incident angle is greater than the first incident angle by less than about 50 degrees. For wavelengths in the remaining wavelength range, the second optical film reflects at least 80% of light.
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42.发明授权公开(公告)号：US11487159B2
公开(公告)日：2022-11-01
申请号：US17419901
申请日：2020-01-06
IPC分类号： G02F1/13357 , G02F1/1335
摘要： A backlight (100) for an image forming device (70) includes spaced-apart front and back optical reflectors (20, 10) defining an optical cavity (18) therebetween, and at least one light source (15) for emitting light into the optical cavity. The front optical reflector (20) is disposed between the image forming device and the back optical reflector (10). For substantially normally incident light and for non-overlapping first (e.g. visible light) and second (e.g. infrared) wavelength ranges, the front optical reflector (20) may transmit (80c) at least 70% of light (80a) for each wavelength in the first wavelength range, and may reflect (90b) at least 70% of light (90a) for each wavelength in the second wavelength range. The back optical reflector (10) may reflect (80b) at least 70% of light for each wavelength in the first wavelength range, and may transmit (90c) at least 70% of light (90b) for each wavelength in the second wavelength range. The light (80a, 90a) emitted by the at least one light source (15) has at least one wavelength in the first wavelength range and at least one wavelength in the second wavelength range.
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43.发明授权公开(公告)号：US11187847B2
公开(公告)日：2021-11-30
申请号：US16619300
申请日：2018-06-05
摘要： Backlights are described. In particular, backlights including wide-web turning films and reflective polarizers having quarter-wave retarders are disclosed. Such configurations can provide turning film systems with improved luminance uniformity for large format displays.
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公开(公告)号：US20210325587A1
公开(公告)日：2021-10-21
申请号：US17273047
申请日：2019-08-29
发明人： Matthew B. Johnson , Adam D. Haag , Carl A. Stover , Timothy J. Nevitt , William F. Edmonds , Stephen A. Johnson
IPC分类号： G02B5/30
摘要： Multilayer reflective polarizers are described. In particular, multilayer reflective polarizers that include both crystalline high index layers and low index layers are disclosed. These reflective polarizers may be particularly suitable for automotive, architectural, and industrial applications.
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公开(公告)号：US11073646B2
公开(公告)日：2021-07-27
申请号：US16767368
申请日：2018-11-29
摘要： Thin multilayer reflectors are described. In particular, thin multilayer reflectors that partially transmit blue light and reflect green and red light are described. The thin multilayer reflectors have a uniform left bandedge across each dimension of the film, wherein the location of the left bandedge varies in a range of no more than 10% of the average left bandedge across that dimension.
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46.发明授权公开(公告)号：US10754073B2
公开(公告)日：2020-08-25
申请号：US16338943
申请日：2017-11-21
IPC分类号： G02B5/30
摘要： Optical stacks including a first reflective polarizer and a partially reflective component are described. The partially reflective component may be a second reflective polarizer or a collimating reflector. The first reflective polarizer has a first average visible light reflectance for light polarized along the first block axis at normal incidence of at least 90 percent and a first average visible light transmittance for light polarized along the first pass axis at normal incidence of at least 85 percent. The second reflective polarizer has a second block axis and a second average visible light reflectance for light polarized along the second block axis at normal incidence being no more than the first average visible light reflectance minus 10 percent. The first and second block axes are not parallel and the first and second reflective polarizers have different f-ratios.
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47.发明申请公开(公告)号：US20200166684A1
公开(公告)日：2020-05-28
申请号：US16624644
申请日：2018-06-26
IPC分类号： G02B5/30 , B32B27/06 , G02F1/1335
摘要： Rolls of film are described. In particular, rolls of film including multilayer birefringent polarizers having low pass axis variation are described. The multilayer birefringent polarizers have low pass axis variation across a full crossweb width of the roll of film.
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公开(公告)号：US20190250320A1
公开(公告)日：2019-08-15
申请号：US16393495
申请日：2019-04-24
CPC分类号： G02B5/3083 , B32B7/02 , B32B27/08 , B32B27/36 , B32B27/365 , B32B2307/42 , G02B5/0841 , G02B5/305
摘要： Thermoplastic birefringent multilayer optical films are described. More particularly, thermoplastic multilayer films having alternating first and second layers having a linear layer profile where both outer layers are thinner than 350 nm but thicker than 150 nm are described. Thermoplastic birefringent multilayer optical films with thinner outer protective boundary layers are described.
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公开(公告)号：US20190004227A1
公开(公告)日：2019-01-03
申请号：US16126960
申请日：2018-09-10
发明人： Sun-Yong Park , Song-Geun Lee , Matthew B. Johnson , Adam D. Haag
IPC分类号： G02B5/30 , B32B23/04 , B32B23/08 , B32B27/08 , B32B27/30 , B32B27/32 , B32B27/36 , B32B7/12 , G02F1/13363 , G02F1/1335 , G02F1/1337
摘要： Optical film stacks are described. More particularly, optical film stacks including a half-wave retardation layer are described. Achromatic half-wave retardation layers, including achromatic half-wave layers formed from a quarter-wave and a three-quarters-wave retardation layer, are described. Film stacks including reflective polarizers tuned to reduce wavelength dispersion of the half-wave retardation layer are also described.
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公开(公告)号：US20180215060A1
公开(公告)日：2018-08-02
申请号：US15747353
申请日：2016-08-17
发明人： Matthew B. Johnson , Steven P. Floeder , Kristy A. Gillette , Arthur L. Kotz , Michael L. Ruegsegger
CPC分类号： B26D5/32 , B26D5/007 , B26F1/44 , B41M3/003 , G02B5/04 , G02B5/20 , G02B5/3033 , G02B5/3041 , G02B5/3083
摘要： Optical films having an optical axis with an orientation that varies along a width of the optical film and having one or more indicia recording the orientation of the optical axis at a plurality of locations in the optical film are provided. Systems and methods for producing and for converting the optical films are provided.
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